CodeTM 55-4920-428-30PExplanationStocked items; use the applicable NSN to request/requisition items thesesource codes. They are authorized to the category indicated by the codeentered in the 3d position of the SMR code.**NOTE: Items coded PC are subject to deterioration.Items with these codes are not to be requested/requisitioned individually.They are part of a kit which is authorized to the maintenance category in-dicated in the 3d position of the SMR code. The complete kit must be requisi-tioned and applied.(2) Maintenance Code. Maintenance codes tells you the level(s) of maintenance authorized to USEand REPAIR support items. The maintenance codes are entered in the third and fourth positions of theSMR Code as follows:(a) The maintenance code entered in the third position tells you the lowest maintenance levelauthorized to remove, replace, and use an item. The maintenance code entered in the third position will in-dicate authorization to one of the following levels of maintenance.CodeApplication/ExplanationC-Crew or operator maintenance done within organizational oraviation unit maintenance.O-Organizational or aviation unit category can remove, replace, anduse the item.F-Direct support or aviation intermediate level can remove, replace,and use the item.H-General support level can remove, replace, and use the item.L-Specialized repair activity can remove, replace, and use the item.D-Depot level can remove, replace, and use the item.(b) The maintenance code entered in the fourth position tells whether or not the item is to berepaired and identifies the lowest maintenance level with the capability to do complete repair (i.e., performall authorized repair functions). (NOTE: Some limited repair may be done on the item at a lower level ofmaintenance, if authorized by the Maintenance Allocation Chart (MAC) and SMR codes.) This position willcontain one of the following maintenance codes.3